YUS270钢焊接接头耐点蚀试验

Pitting resistant test of welded joint of YUS270 steel

YUS270钢是由新日本制铁公司开发生产的超奥氏体不锈钢,具有优良的防腐蚀性能。为检测其焊接接头在含有氯离子环境中耐点蚀破坏性能,依据美国ASTM G-48 Test Method C at 40℃标准,经FeCl3盐酸溶液在40℃72 h腐蚀后,比较腐蚀前后重量,测量点蚀密度和最大蚀坑深度。结果表明,在此试验条件下,失重、点蚀密度和最大蚀坑深度均满足标准要求,验证了YUS270钢在氯离子环境中具有良好的耐点蚀性能,为其在海洋石油平台上的应用提供了试验依据。

YUS270 steel is a super austenitic stainless steel produced by Japan and has a perfect pitting resistance.The specimens had been put into the hydrochloric acid with FeCl_3 for testing pitting resistance.The experiment was based on ASTM G-48 Test Method C at 40 ℃.Then the losing weight,pitting density and maximal depth were compared.The results showed that all the items satisfied the standard in this condition.It also proved the excellent pitting resistance of Cl^(-1) of YUS270 steel and provided the evidence for the application in the offshore oil platform.